High power coaxial adapters and connectors

Abstract

Coaxial cable adapters and connectors are provided that are particularly suited for use in high power applications. A flowable insulator filling a cavity within the adapters and connectors improves heat conduction from inner conductors outwards while providing electrical insulation around the inner conductors.

What is claimed is: 
     
         1 . A coaxial adapter comprising:
 a first outer body,   a first solid insulator within the outer body,   a first inner conductor within the first solid insulator,   a second inner conductor engaged with the first inner conductor,   a second solid insulator surrounding the second inner conductor and enclosing a chamber within the first outer body that is also enclosed by the first solid insulator, the engagement between the first and second conductors residing within the chamber, and   a flowable insulator filling the chamber around the engagement between the first and second conductors.   
     
     
         2 . The adapter of  claim 1  wherein the second inner conductor is a pin and the second insulator is a hermetic seal formed between the second inner conductor and the first outer body. 
     
     
         3 . The adapter of  claim 1  wherein the first outer body is comprised of two or more first outer body components joined together. 
     
     
         4 . The adapter of  claim 1 , wherein a gap exists between a surface of the first solid insulator bounding the cavity and an opposing surface of the second solid insulator bounding the cavity and the flowable insulator fills the gap, separating said solid insulator surfaces. 
     
     
         5 . The adapter of  claim 1 , wherein the flowable insulator provides a heat conduction path from the engagement between the first and second conductors to the first outer body that has less resistance to heat conduction than if the cavity were filled with air instead of the flowable insulator. 
     
     
         6 . The adapter of  claim 1 , wherein the flowable insulator is a powder. 
     
     
         7 . The adapter of  claim 6 , wherein the powder comprises Boron Nitride. 
     
     
         8 . The adapter of  claim 6 , wherein the powder comprises Silicon Dioxide. 
     
     
         9 . The adapter of  claim 6 , wherein the powder has an average particle size of approximately 10 microns. 
     
     
         10 . The adapter of  claim 1 , further comprising a flowable insulator within the cavity that is formed of a solid material. 
     
     
         11 . The adapter of  claim 1 , wherein the second inner conductor is an inner conductor of a cable. 
     
     
         12 . The adapter of  claim 1 , wherein a surface of the first solid insulator bounding the cavity is conical. 
     
     
         13 . A coaxial connector, comprising:
 a first outer body,   a second outer body engaged with the first outer body,   a first solid insulator within the first outer body,   a first inner conductor within the first solid insulator,   a second inner conductor engaged with the first inner conductor,   a second solid insulator surrounding the second inner conductor, within the second outer body, and enclosing a chamber between itself and the first solid insulator, and   a flowable insulator filling the chamber around the engagement between the first and second inner conductors, wherein   a surface of at least one of the first and second inner conductors is exposed to the flowable insulator filling the chamber, and   a surface of at least one of the first and second outer bodies is exposed to the flowable insulator filling the chamber.   
     
     
         14 . The connector of  claim 13 , wherein a gap exists between a surface of the first solid insulator bounding the cavity and an opposing surface of the second solid insulator bounding the cavity and the flowable insulator fills the gap, separating said solid insulator surfaces.